brandreth



B. BRANDRETH.

Making Extracts.

Patented Jan. 20, 1843- lnvnton Witnesses:

AM. PHDTO-LITHOSI N.Y.(0SBORNE'5 PROCESS.)

- ra n STA s BENJN BRANDRETH, OF NEW YORK. N. Y.

"MAKING VEGETABLE EXTRACTS.

T all whom, it may concern I Be it known that I, BENJAMIN BRANDRETH,ofthe city and Stateof New York, doctor of medicine, have discovered anewand' useful: Improvement in the Art of =Making Vegetable Extracts forMedicinaland" other Purposes and that I have invented a new and usefulmachine for the application of such improvement.

The said improvement which I have discovered consists in the applicationof the liquid menstruum or solvent to the vegetable matter from whichthe extract is to be prepared, while such vegetable matter is in avacuum and without the application of heat whereby the solubleprinciples of the vegetable matter are more readily extracted withoutsustaining any change or deterioration.

The said machine is described as follows reference being had to thedrawings hereunto annexed and which are to be taken as part of thisspecification.

The drawing contains several views of the machine and its parts, and thelettering of the parts of the machine correspond in the severaldrawings.

(A) represents an air tight metal hollow cylinder with a cap at the topfitting'air tight and capable of being either removed or fastened bymeans of screws as represented in the drawings. The bottom of thecylinder is perforated with a hole which may be stopped with the screwrepresented in the drawing marked In the cylinder a movable piston headis to be fitted air tight which is represented in the drawing and marked(g, g). With the cylinder an air pump is connected marked (C) in thedrawing, by means of the tube marked (k), which tube communicates withthe cylinder by stop, cocks at (e) and (cl) of which (d) opens into thecylinder near the cap and (6) near the middle. A forcing pump ofordinary construction (marked (B) in the drawing) is also connected withthe cylinder by means of the tube (g) which communicates with thecylinder by the stop cock (0) near the top of the cylinder. The tube (V)supplies either air or water to the force pump. The tube and the stopcock (Z1) communicate with the cylinder.. This tube is constructed atits junction with the stop cock in such manner that it may be reversedso as to bring the aperture of the tube into a vessel of liquid for thepurposeafter mentioned. These are the materialjparts of machine whichfor-use in a large way should be conducted. upon the scale stated" inthe drawing. V

jTo"work;this' machine thecap ofthe. cylinder should betake'noif andthepisto'n head (q, q) removed and the interior space of the cylinderfilled with the vegetable matter from which the extract is to be made.

The piston head is then to be placed upon the top of the vegetablematter in the cylinder and the cap to be replacedand fastened tight bymeans of the screws. The screw (.9) at the bottom of the cylinder isalso to be made fast, and the stop cocks at (Z2) and (a) and (0) are tobe shut off. By.

these arrangements the cylinder is left, having no connection exceptwith the air pump by means of the tube (71.) and the two stop cocks (e)and (d). The air in the cylinder both above the piston head and alsobelow the same is then to be exhausted by the air pump as nearly as maybe. This being done the stop cocks (e) and (d) are to be shut off, thetube (f) is to be inverted into a vessel containing the liquid solventor menstruum, and the stop cocks (6) being. opened, the liquid will passby force of the atmospheric pressure into the cylinder upon thevegetable matter and must be allowed to remain in contact with thevegetable matter for such time as is necessary to efiect a solution ofthe soluble principles of the, vegetable matter which must varyaccording to the substances from which the extract is to be prepared andthe liquid solvent or menstruum used for making the extract andconcerning which time no rule can be specified; However a much shortertime will suffice to effect the solution than would be requisite werethe same not efi'ected after the exhaustion of the air. After thesolution shall be thus eflected the stop cock (6) is to be closed, thescrew (8) is to be loosened and taken out and the stop cock (0) openedand by applying pressure upon the piston head by means of the force pumpwhich may be used either with air or water, the extract dissolved in thesolvent or menstruum will be forced out in a pure condition, leaving thevegetable residuum deprived of all its solumanner.

.ble principles in the cylinder. The extract is then to be evaporated inthe usual V The advantage of this improvedprocess consists in the veryspeedy solution of all liquid solvent or menstruum in, vacuum 5 Withoutheat, and also the mode of effecting the said operation by the apparatushereinbefore described. 7 V

Of course I do not claim the air pump or force pump as my invention, butonly-the combination of the cylinder air pump and 7 force pump for thepurpose stated and in the manner stated. p r Dated and signed January 7,184:3.

1 BBRANDRETH. In presence of ALEXANDER S. JOHNSON, CHs. F. SOUTHMAYD.

